英文版GRE数学考试重要考点（2）

　　新gre数学重要考点：Multiplying Polynomials

　　Multiplying Polynomials

　　To multiply two polynomials, open up the first polynomial and multiply the second polynomial with each term.

　　Example:

　　If we multiply and ,we get =3x+2=12x3-3x2+3x+8x2-2x+4=12x3+x2+x+4=12x3+5x2+x+4.

　　Remember:

　　Do not froget to multiply all the terms.

　　Repeat distributive law when multiplying polynomials.

　　新gre数学重要考点：Subtracting Polynomials

　　Subtracting Polynomials

　　To subtract polynomial from another, subtract the like terms. Like terms are those with the same variable and identical power.

　　Example:

　　By subtracting from ,we get 4x2+x+=4x2-4x.

　　Remember:

　　Only subtract the like terms.

　　新gre数学重要考点：Adding Polynomials

　　Adding Polynomials

　　To add two polynomials, add the like terms. Like terms are those with the same variables and identical powers.

　　Example:

　　By adding and , we get 4x2++=4x2+2x+4.

　　Remember:

　　Only add the like terms.

　　新gre数学重要考点：Polynomials

　　Polynomials

　　Any expression with one or more terms is called polynomial.

　　Example:

　　3x+2,4x2-x+2,and 4x+3xy+y2are all polynomials.

　　)and sin are not polynomials.

　　Remember:

　　Order of a polynomial is the highest power of any variable.

　　The highest power in an n-th order polynomial is n.

　　Both monomials and binomials are polynomials of order 1 and 2, respectively.

　　由于美国数学基础教育的难度增加导致数学考试越来越难，但新gre数学复习考点都是高中时候学到的知识点，考生不要过于紧张，把基本概念弄明白，再记住一些新版gre数学必备的词汇，那么相信新版gre数学应该没有问题。